Write a JavaScript function that checks whether a given number is prime or not.

 function isPrime(number) {

  if (number <= 1) {

    return false;

  }

  for (let i = 2; i <= Math.sqrt(number); i++) {

    if (number % i === 0) {

      return false;

    }

  }

  return true;

}

// Test the function

const num = 29;

const isNumPrime = isPrime(num);

console.log(isNumPrime);